Asubmarine sends sonar signals to the ocean floor. over time, the signals take longer to reflect off of the ocean floor and back to the submarine. which of the following could explain why this is? a- the signals could be reflecting off of objects above the ocean floor b- the sound waves could be slowing as they move through the water c- the submarine could be rising toward the surface d- the submarine could be moving toward the ocean floor

Turtle hatchling survivorship rate is low in many turtle species due to predation. amanda researched the predatory rate on a species of turtle eggs in the red river. the eggs were harvested from trapped turtles and the egg's cloaca film (reproductive discharge) was either washed off or left on once gathered. research suggests that predators use the female's cloaca scent to locate the eggs. the eggs were only handled when wearing gloves and then reburied along islands where the turtles were trapped. the nests were monitored by cameras and manually on foot and data on nest predation were recorded. a. based on the experimental design, what is the dependent variable? b. based on the experimental design, what is the independent variable? c. based on the experimental design, what is the control?

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?

What is the difference between topsoil and clay?